I'm going to investigate moving all of the cni (bindings) code in frysk-imports
moving it into frysk-sys. That would be the lib/ frysk/ and inua/ directories.
At present working on those bindings is a pta as it is too easy to trigger an
unnecessary re-build / re-conf when modifying a binding. This will also open
the way for making parts of frysk-imports, such libunwind and elfutils optional.